靴べら式プラスチック装具の変形測定と応力解析(3部障害・運動・評価)

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The functions of the plastic shoe horn brace (SHB) are prevention of the plantar-flexion of the ankle joint during the swing phase and stabilization of the ankle and knee joint during the stance phase. These functions can be changed by regulating the flexibility of the ankle part of SHB. And these functions should be adapted to the gait status of each patient. In order to quantify the functions of SHB, the following experiments were performed on two normal subjects and three hemiplegic patients using SHB with variable flexibility. First, the change of gait due to the effect of the flexibility of SHB was investigated using the gait measuring system. Second, the change in the transformation of SHB due to flexibility was investigated using the transformation gauge. Third, the relationship between the shape, stress, and function of SHB was investigated using finite element analysis. The results are as follows: (1) The degree of resistance of SHB against the dorsi-flexion force influences the cadence, stride length, and timing of the push-off, dorsi-flexion of the ankle joint during the last part of the stance phase, and the knee joint moment during the last part of the stance phase. This resistance should be as small as possible except the case of genu recurvatum gait. (2) Although the SHB is quite flexible, the effects of preventing plantar-flexion of the ankle joint during the swing phase and abnormal inverson-eversion of the ankle during the stance phase are retained. (3) The degree of resistance against the dorsi-flexion force is influenced by the flexibility of the part of the foot of SHB; the degree of resistance against the plantar-flexion force is influenced by the perimeter of the narrowest part of SHB. (4) The shape of the ankle part of SHB influences the direction of the twist of SHB and the position of the stress concentration.
バイオメカニズム学会の論文
1988-06-15

靴べら式プラスチック装具の変形測定と応力解析(3部障害・運動・評価)

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靴べら式プラスチック装具の変形測定と応力解析(3部 障害・運動・評価)

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靴べら式プラスチック装具の変形測定と応力解析(3部障害・運動・評価)